Research on voltage level configuration in medium voltage network of new area

For new areas with high orientation, high vacancy and rapid development, traditional power supply with 10 kV cannot meet their load demand; therefore, medium voltage distribution system for new areas should adopt 20 kV that has been utilized widely abroad. To solve the problems of power system voltage level configuration in most areas, this paper analyzes first the feasibility of 20 kV supply from the aspects of technology, equipment and management. Then comparison on economical efficiency between 10 kV and 20 kV supply plans for different load densities is provided with the minimum cost model. Reliability of different supply plans is also analyzed with classical reliability theory. At last, it is concluded that the 20 kV power supply plan should be a priority for new areas based on comprehensive comparisons on technology feasibility, reliability and economical efficiency of operation.